KANSAS CITY, Mo. – Tammy Dickinson, United States Attorney for the Western District of Missouri, announced that a Warrensburg, Mo., man was sentenced in federal court today for distributing and possessing hundreds of thousands of images of child pornography.

Richard Alan Sigsbury, 52, of Warrensburg, was sentenced by U.S. District Judge Gary A. Fenner to 21 years and 10 months in federal prison without parole.

On Oct. 30, 2014, Sigsbury pleaded guilty to four counts of distributing child pornography, four counts of advertising child pornography, one count of possessing child pornography and one count of possessing child obscenity.

According to court documents, Sigsbury actively advertised the contents of his collection to other like-minded pedophiles and distributed images of the sexual abuse of children to these individuals.

Sigsbury admitted that he was in possession of more than 500,000 images of child pornography and more than 600 videos of child pornography, including images of prepubescent children in bondage. Sigsbury admitted that he was involved in child pornography for more than a decade.

Federal agents in Texas identified Sigsbury’s e-mail address during an undercover investigation into online child pornography distribution. Agents executed a search warrant at Sigsbury’s residence on April 17, 2012, and seized computers, recording devices and electronic storage devices.

This case was prosecuted by Assistant U.S. Attorney Katharine Fincham. It was investigated by the FBI.

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